> Well, what is "the problem"? Is it children being abused, or is it the distribution of CSAM?

It seems obvious that it is entirely the former and not at all the latter. In other words, N is positive infinity. Am I missing something?

I only care about kids being hurt. And I think this view is close to consensus.

Ask anyone you know who has been sexually assaulted or raped what they think of the idea of pictures or recordings of that being both kept by the perpetrator and widely disseminated. I think you'll find very few who'd say that's totally fine. But given that there can be no CSAM without child abuse, the direct physical abuse is clearly the primary problem.